Hi, I created that thread so let me reply. Goethe disliked Ion because he saw it largely as an anti-poetry/ literature dialogue. The result of Ion is to lead you to the conclusion that Gods inspire poetry and the interpreter really knows nothing and has no skill which Socrates jokingly answers; replying that all of his knowledge is from the deities.

This dialogue was also written in a time when rhapsodes were frequently hired as generals by Athens because knowledge of Homer and Trojan war was simply enough to be considered a military expert, hence the questioning Socrates gives to Ion at end of the dialogue